Child safety seat



FIG. 1 is a top, front, right side perspective view of the child safety seat, showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof; and,

FIG. 6 is a top view thereof.

The broken lines in the drawings depict portions of the child safety seat that form no part of the claimed design. 

CLAIM The ornamental design for a child safety seat, as shown and described. 